FIELD: organic chemistry. SUBSTANCE: product: derivative of 1,2,4-triazole-[1,5-c] -pyrimidine-2-sulfonamide of the formula C1-C2 (I) where X - C1-C2-alkoxy, methyl; Y - CO2(C1-C3)-alkoxy, hydrogen, methyl, trifluoromethyl, clorine, bromine or fluorine; Z - methoxy, hydrogen, methyl, trifluoromethyl, chlorine, bromine or fluorine; A - fluorine, chlorine, bromine, CON(CH3)2,CF3-alkyl, NO2 or CH3; B - hydrogen, fluorine, chlorine, bromine, methyl, methoxy; D - hydrogen or OCH3 at condition that at least one of X and Y means OC2H5 or 
at amount 6-12%, and special additions - the rest. Composition is used in agriculture for plant chemical protection. EFFECT: improved method of synthesis, enhanced effectiveness of composition proposed. 3 tbl, 17 ex
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